 Browse by Category

Browse by School/
Graduate School
Communication Engineering
Masaaki KATAYAMA Professor
Department: School of Engineering / Graduate School of Engineering
Class Time:  2011 Fall Wednesday 
Recommended for:  undergraduate students of Electrical and Electronic Engineering Course 
Course Overview
Course Contents
<
p> Analog and digital wireless systems constitute important infrastructure of our society. Analog wireless systems have been in use for many years for radio and television broadcasting, while digital data transmission systems are used for hightech devices such as digital terrestrial/satellite broadcasting systems, mobile phones, computers connected to wireless LAN, etc. This lecture introduces basics of such radio transmission technologies for many kinds of information such as voice, video.
<
p> Main objective of the lecture is to understand the process of carrying information by the radio wave, i.e. modulation and demodulation. In addition, we will be learning about the multiple accesses, or a technology to share the same communication channel or physical media with several data streams or signals. CDMA is one of the examples of multiple accessing technologies used for mobile phone.
Key Features
<
p> In this lecture, many homeworks and exercises will be given. For this reason, students may feel that this course will be a tough one. Your questions in the lecture or by email messages after the class are always welcome.
Close Section
Syllabus
Course Aims
<
p> In this lecture we will be learning about the basics of wireless communication systems. In particular we will be focusing on mathematical representations of radio signals, modulation and demodulation procedures, and multiple access schemes. Exercise problems will be given for your better understanding.
<
p> Objectives of this lecture are to understand following.
 Mathematical representations of radio signals. Difference and frequency spectra of deterministic signals, and random or stochastic signals.
 Analog modulation and demodulation schemes.
 Digital modulation and demodulation schemes
Course Requirements and recommended courses
<
p> Basics of calculus, stochastic process and complex function theory are required. We will review some of these mathematical methods in some part of the lecture.
Contents
<
p> This lecture is designed for Electrical and Electronic Engineering students and Information Engineering senior students to get the fundamental understanding of radio transmission system. This lecture is only an introductory level course for the radio transmission techniques. More advanced material such as analysis of radio transmission error detection and correction will be on the graduate level course.
Textbooks
<
p> No textbooks are assigned. Handouts (50 pages long) will be given and used in the lecture.
Recommended books for reading
<
p> John G. Proakis, Digital Communications, McGraw Hill
Other books will be notified by the instructor.
Students Accomplishments
Accomplishments given in 2005
<
p>Note: All files are in Japanese
 Homework No. 1 (PDF, 59KB)
 Homework No. 2 (PDF, 54KB)
 Homework No. 3 (PDF, 52KB)
 Homework No. 4 (PDF, 58KB)
 Homework No. 5 (PDF, 45KB)
 Homework No. 6 (PDF, 59KB)
 Homework No. 7 (PDF, 57KB)
 Homework No. 8 (PDF, 59KB)
Course Schedule
Session  Content 

1  Chapter 1 Basics of radio transmission system  Characteristics of wireless transmission systems and comparisons with wire communication systems.  Main constituents of wireless transmission systems. 
2  Chapter 2 Deterministic signal and frequency spectrum  Understanding of deterministic signal and indeterministic signal.  Review on Fourier series expansion 
3  Chapter 2 Deterministic signal and frequency spectrum continued  Fourier transform of Continuous deterministic function  Basic understanding of Fourier transform 
4  Chapter 2 Deterministic signal and frequency spectrum continued  Mathematical representation of narrowband signal and linear time invariant system 
5  Chapter 3 Basics of modulation  What is modulation?  Classification of modulation schemes 
6  Chapter 4 Analog modulation  Modulation and demodulation methods of AM, DSB, SSB and VSB signals. 
7  Chapter 4 Analog modulation continued  Modulation and demodulation method of phase modulated signals and frequency modulated signals  Relations of these two signals. 
8  Exercise  Quiz on the material from Chapter 1 to Chapter 4 
9  Chapter 5 Autocorrelation function and its Fourier transform  Autocorrelation function and its application on the indeterministic signal and deterministic signal  Meaning of the Fourier transform of autocorrelation function and power density spectrum. 
10  Chapter 6 Linear digital modulation method  Relation between waveform and spectrum of linear digital modulation 
11  Chapter 6 Linear digital modulation method continued  Receiving method of digitally modulated signal  Comparisons of various linear digital modulation method 
12  Chapter 6 Linear digital modulation method continued  Constant envelope modulated signal 
13  Chapter 7 Digital FM and OFDM  Modulation and demodulation method of digital FM signal  MSK and relation between FM and linear digital modulation  OFDM which is used for wireless LAN and digital terrestrial television OFDM involves complicated manipulation, which is unable to explain in classical physics, and it is worth studying in this lecture. 
14  Chapter 8 Spectrum diffusion  Spread spectrum technique that are used commonly in mobile phone or in wireless network system 
15  Chapter 9 Multiple accessing techniques  Technology of sharing the same communication channels or physical media with several data streams or signals 
Grading
 Students are required to achieve objectives written in course aim.
 Evaluation will be given based on Midterm exam (40%), Final term exam (40%), exercise (20%).
 It is required to get more than 55% to get credits from this course.
Close Section
Class Materials
Lecture Handouts
<
p>Note: All files are in Japanese
 content (PDF, 70KB)
 List of formulas (PDF, 37KB)
 1st Lecture
 Chapter 1 Basics of radio transmission system (PDF, 289KB)
 2nd to 4th lecture
 Chapter 2 Deterministic signal and frequency spectrum (PDF, 207KB)
 5th lecture
 Chapter 3 Basics of modulation (PDF, 125KB)
 6th to 7th lecture
 Chapter 4 Analog modulation (PDF, 416KB)
 9th lecture
 Chapter 5 Autocorrelation function and its Fourier transform (PDF, 69KB)
 10th to 12th lecture
 Chapter 6 Linear digital modulation method (PDF, 290KB)
 13th lecture
 Chapter 7 Digital FM and OFDM (PDF, 262KB)
 14th lecture
 Chapter 8 Spectrum diffusion (PDF, 146KB)
 15th lecture
 Chapter 9 Multiple accessing techniques (PDF, 94KB)
Close Section
Page last updated October 16, 2009
The class contents were most recently updated on the date indicated. Please be aware that there may be some changes between the most recent year and the current page.